Update dependency juju/juju to v3.4.4 (#463)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -68,13 +68,13 @@ jobs:
           - agent: 2.9.49  # renovate: juju-agent-pin-minor
             libjuju: ^2
             allure_on_amd64: false
-          - agent: 3.4.3  # renovate: juju-agent-pin-minor
+          - agent: 3.4.4  # renovate: juju-agent-pin-minor
             allure_on_amd64: true
         architecture:
           - amd64
         include:
           - juju:
-              agent: 3.4.3  # renovate: juju-agent-pin-minor
+              agent: 3.4.4  # renovate: juju-agent-pin-minor
               allure_on_amd64: true
             architecture: arm64
     name: Integration | ${{ matrix.juju.agent }} | ${{ matrix.architecture }}